Background: Organizational support acts as the fuel that energizes nursing staff to contribute to their organizations with full potentials and capabilities and go beyond the call of duty and to adopt citizenship behaviors. Aim of the Study: Investigating organizational support and citizenship behavior among head nurses.  Research Design: A descriptive correlational research design was utilized. Setting: The study was conducted at Beba Central Hospital, Beni–Suef Governorate, Egypt. Sample: A convenient sample of (60) head nurses was recruited for the study. Data collection tools: Two data collection tools were used; organizational support questionnaire and nursing personnel's citizenship behavior. Results: The majority of the head nurses had moderate perceptions of organizational support and high perceptions of citizenship behavior (90% and 88.3%) respectively. Conclusion: The current study concluded a moderate positive correlation between head nurses' perceived organizational support and citizenship behaviors. Recommendations: Creating innovative strategies for designing supportive work practice environment for nursing staff and cultivating the sense of citizenship among nursing staff.